You know that thing in live games where once the game has finished it shows if a player/s has left so you know that if you type anything it would be falling on deaf ears....

Can this be extended to all forms of live game including in realms for when you are allying or invading as a lot of times you could be talking but have no idea if the players is still there or not. Obviously if it is as invader it should just read 'player has left' as that should be anonymous